共 8 条
- [1] BESCH PK, 1965, INT C SERIES 86, P147
- [3] KAERN T, 1949, MORDISK MEDICIN, V41, P406
- [4] LEWIT S, 1965, INT C SERIES 86, P98
- [5] Norris CC, 1909, SURG GYNECOL OBSTET, V9, P123
- [6] NOVAK ER, 1967, NOVAKS GYNEC OBSTET, P446
- [8] WILLIAMS JW, 1903, OBSTETRICS, P537